BMW G12 Product Information page 132

G12￿Driver￿Assistance￿Systems
19.￿Cruise￿Control
Thanks￿to￿the￿radar￿sensor's￿improved￿detection￿capability￿and￿alignment￿with￿the￿image￿data￿from
the￿KAFAS￿stereo￿camera,￿vehicles￿in￿neighboring￿lanes￿are￿also￿detected.￿If￿these￿vehicles￿are￿driving
in￿their￿own￿lane,￿then￿ACC￿Stop&Go￿adapts￿the￿speed￿to￿the￿vehicle￿pulling￿in￿or￿vehicle￿ahead.￿As￿a
result,￿a￿time￿lag￿selected￿by￿the￿driver￿is￿constantly￿maintained.
ACC￿Stop&Go￿adjusts￿the￿speed￿if￿there￿is￿no￿vehicle￿driving￿directly￿ahead￿and￿automatically
switches￿to￿distance￿control￿if￿the￿sensor￿system￿detects￿a￿slower￿vehicle￿in￿its￿lane.￿The￿system's
Stop￿&￿Go￿function￿brings￿the￿vehicle￿to￿a￿complete￿standstill￿if￿necessary.
If￿the￿vehicle￿ahead￿drives￿off￿again￿after￿a￿standstill,￿the￿driver￿is￿informed￿thereof￿with￿a￿note.
To￿drive￿off￿again,￿the￿driver￿must￿acknowledge￿this￿information￿by￿pressing￿the￿RES/CNCL￿button￿or
the￿accelerator￿pedal.￿Only￿if￿the￿duration￿of￿the￿standstill￿is￿very￿short￿(about￿3￿seconds)￿is￿the￿starting
process￿effected￿fully￿automatically￿by￿ACC￿Stop&Go.
In￿this￿way,￿ACC￿Stop￿&￿Go￿supports￿the￿driver￿not￿only￿in￿flowing￿traffic,￿but￿also￿in￿traffic￿jam
situations,￿both￿on￿multiple-lane￿highways￿and￿ordinary￿roads￿and￿on￿urban￿arterial￿and￿ring￿roads.
The￿adjustment￿range￿for￿the￿set￿speed￿is￿limited￿to￿a￿maximum￿of￿210 km/h.
If￿ECO￿PRO￿or￿SPORT￿mode￿is￿activated,￿the￿Active￿Cruise￿Control￿with￿Stop&Go￿function￿is￿also
set￿to￿a￿fuel-efficient￿or￿sporty￿driving￿style.￿Due￿to￿the￿fuel-efficient￿driving￿style￿in￿ECO PRO￿driving
mode,￿in￿some￿situations￿the￿vehicle's￿speed￿may￿exceed￿or￿drop￿below￿the￿set￿speed,￿for￿example￿on
downhill￿gradients￿or￿inclines.
19.3.1.￿Control￿functions
The￿calculations￿are￿performed￿in￿the￿optional￿equipment￿control￿unit￿SAS.
Cruise￿control
In￿principle,￿the￿cruise￿control￿in￿the￿ACC￿Stop&Go￿system￿works￿in￿exactly￿the￿same￿way￿as￿the
Dynamic￿Cruise￿Control￿(DCC)￿system.
Cruise￿control￿on￿bends
The￿cruise￿control￿of￿the￿ACC￿Stop&Go￿on￿bends￿is￿based￿on￿the￿control￿characteristics￿of￿the
Dynamic￿Cruise￿Control￿(DCC).￿If￿an￿object￿is￿lost￿on￿bends,￿the￿system￿waits￿to￿see￿whether￿the
object￿reappears￿(transition￿curve).￿The￿vehicle￿only￿accelerates￿if￿it￿does￿not￿reappear￿or￿the￿sensor
system￿no￿longer￿detects￿an￿object.￿Tight￿bends￿are￿detected￿via￿the￿data￿of￿the￿Dynamic￿Stability
Control￿system￿DSC￿and￿the￿navigation￿system￿and￿the￿speed￿adjusted￿if￿necessary.
Distance￿control￿(ranging)
The￿distance￿control￿is￿the￿core￿function￿of￿the￿ACC￿Stop&Go￿system.
The￿driver￿can￿select￿a￿desired￿distance￿in￿four￿stages￿using￿the￿multifunction￿button￿on￿the
multifunction￿steering￿wheel￿(MFL).￿From￿this￿preselection￿ACC￿Stop&Go￿calculates￿the￿reference
distance￿to￿the￿vehicle￿driving￿ahead￿for￿the￿control.￿In￿vehicles￿with￿the￿Active￿Cruise￿Control￿optional
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